Starting mechanism for heel seat lasting machines



April 21, 1959 l JSUNDER 2,883,010

STARTING MECHANISM FOR HEEL SEAT LASTING MACHINES Filed May 2. 195e 2 'sheets-sheet 1 ,Z

IIWEN TOR. ma; s No5/2 April 21, 1959 ..SUNDER 2,883,010 STARTINQMECHANISM Foa am'. SEAT LAsTING MACHINES Filed may 2. v195e 2 Smets-sheet4 2 JNVENTOR. #wa-:M059

STARTING MECHANISM FOR HEEL SEAT LASTNG MACHINES Jakob Snder, Oberursel (Taunus), Germany, assigner to Adrian & Busch, Oberursel (Taunus), Germany Application May 2, 1956, Serial No. 582,196

6 Claims. (Cl. 18S-85) This invention relates to heel seat lasting machines and more particularly to a novel starting system for such machines.

In order to relieve the work load on a worker and to increase production, i.e. to eliminate non-productive periods of working time, the present invention contemplates the provision of a starting system for lasting machines of the aforesaid type which is actuated by means of a stroke-initiating or lifting magnet.

It is a particular feature of the invention to provide means facilitating a very effective connection between control or actuating elements of the machine to thereby enable the employment of heretofore known actuating arrangements..

The system according to the invention works considerably faster and requires practically no additional force, since it is only a question of actuating a simple switch which may be arranged at any desired location, 'preferably in the vicinity of the workpiece. 'The use of a `foot starter, through which heretofore known systems were actuated, may thus be omitted.

These and other objects of the invention will become further apparent from the following detailed description, reference being made to the accompanying drawing, showing a preferred embodiment of the invention.

In the drawing:

Fig. 1 is a partly sectional elevational view of the starting mechanism or system constructed'in accordance with the present invention; `and Fig. 2 is a partly sectional view of the drive means for a heel seat lasting machine, illustrating said drive means to the extent necessary for an understanding of the invention; and

Fig. 3 is a view similar to Fig. 2 but showing the invention in a brake release position.

In known arrangements the actuating rod 1 in housing 1a was lifted by means of a foot treadle so that an Vinclined or beveled surface 2 located at 'the upper vend of the rod served to bring a slide member 3 located in a brake shoe 4 provided with a brake lining 5 out of engagement with a cam-follower or pressure slide 7.

As soon as the nose 6 of the slide member 3 is separated from the cam-follower or pressure slide 7, the brake shoe 4 is displaced in upward direction under the action of a spring 8 and by means of the wedge-formed part 27 articulated to said shoe 4, both of which are guided in the head 1a of the machine, whereby wedge 28 is displaced with shaft 29, to thereby simultaneously effect engagement between a friction plate 9 and a friction flange 10, so as to set the machine in operation. Wedge 28 is guided in slot 30 of the head and is rigidly connected with the displaceable bolt 29. Key 28 transmits its axial movement to the housing 34 rigidly lsecured to friction plate 9 in order to effect engagement or disengagement between plate 9 and friction llange 10. The cam-follower or pressure slide 7 is pressed under the action of spring means 11 against a cam 12 and thus is d dtates Pact arranged to follow the movements of the contour of the latter.

When the braking position of the cam is attained, i.e., when the cam-follower or pressure slide 7 is displaced downwardly, it engages the nose 6 of the slide member 3 which has in the meantime been returned to its starting position, whereby the slide member 3 and the brake Slide 4 are pressed downwardly to enable the brake lining 5 to engage friction flange 10. Simultaneously wedgeformed part 27 connected with brake slide 4, eiects a separation of plate 9 from the friction flange 10. The friction plate 9 is separated from the drive wheel or friction flange 10 by suitable means during the downward movement of the cam-follower or pressure slide 7.,

In contradistinction to the known arrangements, the invention is characterized by the fact that the cam-follower or pressure slide 7 is connected with a push rod 13, the movements of the latter being transmitted to a lever 15 pivotally supported at its rear end 14 by the standard of the machine.

To the forward end of this lever there is linked a locking or latching lever 16 which is provided with an extension 17 oriented at a predetermined angle to the longitudinal axis of the latching lever.

The extension 17 is connected by means of a pin and slot connection 18 with a connector rod 25 joined to a lifting or stroke-initiating magnet 19. The lever 16 is provided with a shoulder 26 which engages a forked lever 21 pivotally mounted on the base or standard of the machine. The lever 21 is biased upwardly by a spring 22 and is xed to the rod l by means of a sleeve or collar 23, the free end of the lever 21 being, provided with a locking plate 24 which is engaged by the shoulder 20 of the lever 16, whereby the latter, when in the position shown in Fig. l, prevents upward displacement of the lever 21.

As soon as the connector rod 25 is raised by the action of current flowing through the magnet coil due to closing of a push button switch 26, the latch or shoulder 20 is removed from the plate 24 of the lever 21 to permit the rod 1 to move upwardly `under the action -of the spring 22. As a consequence thereof, the inclined or slanted surface 2 acts on and displaces the'slide member 3 and, in a manner as `described above, `sets the machine in operation.

At the end of the operating cycle or period, the -camv follower or pressure slide 7 is displaced downwardly by the cam 12. The system is so larranged that the cam follower or pressure slide 7 first moves the rod 1 downwardly via the parts l13, 15, 16, 20, 21 and 23 to thereby tension the spring 22. The slanted surface Zffthen releases the slide member 3 to permit the latter to 4move the nose 6 under the cam follower or pressure slide 7, whereby the brake slide 4 is al-so displaced downwardly to eifect complete braking and stopping of the machine.

It will, of course, be readily seen that the switch 26 is opened, either automatically or manually, a short time after it was closed to energize the electromagnet means 19. Upon opening of the switch 26, the core rod 25 moves downwardly again whereby a spring 17a, interconnected between the lever 16 and the machine frame, biases the lever 16 back toward the rod 1 so as to position the shoulder 20 at a location in which it can engage the locking plate 24 upon downward movement of the rod 1 under the faction of the cam 12.

Various changes and modifications may be made without departing from the spirit and scope of the present invention and it is intended that such obvious changes and modifications be embraced by the annexed claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A starting system for a heel seat lasting machine having a drive Wheel; comprising cam drive means, an actuating element adapted to perform a movement from a raised release position to a lowered locking position against the action of a spring, displaceable slide means arranged in the path of said actuating element and moved transversely to the latter, a brake shoe including a brake lining engageable with said drive wheel and supporting said slide means during displacement of the latter, a cam follower movable in upward and downward direction perpendicular to the movement of said slide means and operated by said cam drive means, said cam-follower engaging and operating said slide means and being disengaged from said slide means when said actuating element is in a raised position, whereby upon down* Ward movement of said cam-follower said slide means and said brake shoe are shifted to effectuate through said brake lining a brake action on said drive wheel to stop the motion of said machine, a push rod operatively connected to said cam-follower, whereby downward movement of the latter is transmitted to said push rod, an operable lever connected to said push rod, a latching lever linked to said operable lever and provided with an extension and a shoulder, a forked lever pivotally connected to said actuating element for actuating the latter and biased in a direction to move upwardly toward said cam-follower, a latching plate on said forked lever and normally engaged with said shoulder for releasably retaining said actuating element in said locked position, and electromagnetic means including; a switch operatively connected to said extension of said latching lever, operation of said switch causing energization of said electromagnetic means, whereby said latching lever is swung to disengage said shoulder from said latching plate and to thereby bring said spring-biased actuating element to release position in which said slide means is engaged and moved in said transverse direction and out of engagement with said cam-follower, so that said brake shoe with said brake lining is removed from said drive Wheel to thereby permit the start of the machine motion.

2. A starting system according to claim 1, including tension spring means lixed with one end to a support and with an opposite end to said latching lever to return same upon deenergization of said electromagnetic means by means of said switch to a position in which said shoulder of said latching lever engages said latching plate of said forked lever and thus retains said actuating element in its locked position and tensions the spring thereof.

3. A starting system for a heel seat lasting machine having drive means therefor; comprising cam means, a spring-biased actuating element adapted to perform movements from a lowered locking position to a raised release position, laterally displaceable slide means arranged for movement into the path of said actuating element, a -brake shoe including 'a brake lining and supporting said slide means during displacement of the latter in lateral direction to the movement of said actuating element, a cam-follower normally in contact with said cam means and perpendicular to said slide means and movable in upward and downward direction relative to the movement of said slide means, said camfollower engaging and operating said slide means when said actuating element is in a lowered position and being disengaged from said slide means when said actuating element is in a raised position, whereby upon predetermined movement of said cam follower against said slide means and said brake shoe said brake lining eiectuates a brake action on said drive means to stop the motion of the machine, a push rod operatively connected to said cam-follower and transmitting said predetermined movement to said push rod, lever means operatively connected to said push rod and including latching means having cooperable parts, one part of said latching means being pivotally connected to said actuating element for actuating the latter, and electromagnetic means including a switch and operatively linked to another part of said latching means, whereby upon operation of said switch energization of said electromagnetic means is caused and said one part of said latching means is displaced to disengage said latching means and to thereby cause movement of said spring-biased actuating element from said locking position to said release position in which said slide means is forced by said actuating element to be displaced in said lateral direction and away from said cam-follower, while said brake lining of said brake slide is urged out of engagement with said drive means, to thereby permit the start of the motion of said machine.

4. A starting system according to claim 3, said electromagnetic means including a core rod, and pin and slot connecting means linking said other part of said latching means to said core rod.

S. A system according to claim 3, said switch being located within the reach of an operator during working operation of said machine.

6. A system according to claim 3, said lever means being pivotally supported on said machine, and spring means urging said other part of said latching means toward said one part for cooperation therewith, to thereby retain again said actuating element in said locking position upon deenergization of said electromagnetic means by said switch.

References Cited in the le of this patent UNITED STATES PATENTS 348,636 Park Sept. 7, 1886 1,017,370 Bates Feb. 13, 1912 1,356,406 kSeely Oct. 19, 1920 2,670,817 Tripp Mar. 2, 1954 

